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'W.-J. MUNeAsTBlt v 3 Sheets-Sheet- 1.

MACHINE FOR BORING CYLINDERSl V ellll Edah Patented Sept. 8, 1885.

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W. J. MUNCASTER. f

MACHINE PoR BORING GYLINDERS. t v

No. 326,049. Patented Sept. 8, 1885.

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UNITED STATES PATENT OFFICE.

WALTEPU J. MUNcAsTEE, oE CUMEEELAND, MARYLAND, AssieNoE oE ONE-HALE To MEEWIN MCKAIG, or sAME rLAcE.

MACHINE FOR BORING CYLINDERS.`

SPECIFICATION Forming part of Letters Patent No. 326,049, dated September 8, 18875.

Application tiled April 2.3. 1885. (No model.)

.To @ZZ whom it may concern:

Beit known that I, WALTER J. MUNcAsrER, of Cumberland, in the county of Allegany and State of Maryland, have invented certain new and useful Improvements in Machines for Boring Cylinders, of which the following is a speciiication.

My invention relates to lathes or machines for boring, dressing, and finishing engine and pump cylinders; and it consists in various features and details of construction hereinafter explained, by which the speedy and accurate adjustment of the cylinder is accomplished preparatory to the operations inentioned.

It further relates to the manner of and devices for feeding the cutting-tools'along.

Figure l of the drawings is a front elevation of the machine, showing a cylinder in section, in position to be operated upon; Fig. 2, a top plan View; Fig. 3, an end elevation; Figs. 4, 5, 6, 8, and 9 detail views of parts hereinafter referred to, and Fig. 7 a view showing a modification of the machine.

Prior to this invention much'difliculty has been experienced in boring, dressing, and iinishing cylinders, and a great deal of time has been required to adjust the cylinder preparatory to performing the operations named.

The dressing or iinishing of the ends has hitherto been performed as a separate and indejpendent operation, requiring additional time and labor and involving additional expense.

My invention obviates the difficulties heretofore encountered, and enables me to accomplish the work easily, quickly, and in a thorough manner. j

The construction ofthe machine will be readily understood in connection with the drawings and the following description.

A indicates a firm and substantial base, prefand formed with longitudinal guiding ribs or ways a.

B and C indicate two heads or stocks mounted upon the base A, and guided by the ribs or ways a, the heads being movable lengthwise of the bed. e

D indicates a screw-shaft journaled in suit able supports, b c, on the base A, and having.

right and left threaded portions d ande, which enter correspondingly-threaded holes in the .as required, when the bolts heads or stocks B` C, and serve to move the heads toward or away from each other as the shaft D is rotated in one or the other direction. The end of the shaft is squared to receive a crank or handle by which to turn it, and is held against longitudinal movement by collars or bosses f at both sides of the support b. The screw-shaft D serves also to hold the heads rigidly in any position to which they may be adjusted. Each head B C is formed near its inner end with vertical faces g on the front and rear sides, and these faces are furnished with vertical slots h, for a purpose that will presently appear.

E indicates a vertically-adjustable bed or table having horizontal arms t', which extend along the front and rear faces of the heads or stocks B and C, bearing against and gided by the upright faces g. These arms z' are formed with longitudinal slots j,through which bolts k pass into the vertical slots lz, said bolts serving to hold the bed or table E at any required vertical adjustment, and also to bind the heads or stocks and the table or bed tirml together to prevent play or vibration while the machine is in operation.

The table E is further supported by four vertical screw-stems, F F and G G, journaled or swiveled in the table and screwing into threaded sockets in the base, and by turning these screws the bed may be raised or lowered, la are loosened, Ordinarily it is desired that all these screws be turned simultaneously and equally, in order to raise the bed bodily Without inclining orv tipping it, and for this purpose I provide each screw with a bevel gear or pinion, Z, and connect the several stems by shafts H, I, and J, each carrying two bevel pinions, m. The shafts H and l are j ournaled in the bed E, and have their front ends extended outward in front thereof and squared to receive a crank or handle by which to rotate them. The cross-shaft J connects the gear of one of the screws F F with that of one of the screws G Gr, while the shafts H I connect the twoA screws of each pair, as illustrated in Fig. 4:.

The cross-shaft J is carried at one end in 4a pivoted block or support, n, shaft I, and is supported at its other end by a verticallymovable block, o, resting at its hung upon thel yIO lower end upon an eccentric, p, carried by a short shaft, q, the end of which projects outward beyond the front of the bed E, and is furnished with a crank or handle, r. Thus arranged the shaft I may be raised and lowered, and the screws F and G caused to act independently or in unison, as required.y This is an important provision,beeause it often hap:- pens that the form of the cylinder and its attendant paris necessitates the raising and lowering of one end of the bed or table independently of the other.

Upon the bed or table E are mounted two cross-slides, K, Figs. l and 2, each provided with a traversing screw, L, for moving it across the bed or table, and each formed with a T slot or groove, s, to receive bolt-st by which to fasten the cylinder upon the slides.

As shown in Figs. l and 2, the head or stock Bis furnished with a hollow arbor or spindle, M, upon which is secured a large gearwheel, N.

Through the hollow arbor or spindle aboring bar or shaft, O, passes, said bar or shaft having a key-seat, u, plan ed in it from end to end to permit the bar to slide lengthwise through the arbor and over a key, c, seated in said key-seat and inthe hollow arbor and pressed firmly into the seat or loosened, as required, by a set-screw, w.

The boring-bar or tool-shaft O has a tenon formed on its end to enter a socket in a second bar or shaft, O', journaled in the head or stock C and forming a continuation of har O, a transverse key or pin, fr, passing through the two and locking them firmly together, as shown in Figs. 1, 2, and 8. The same key serves to secure upon the shaft a radial arm 0r feedstock, P, containing a feed-screw, y, having a star-wheel, Q, at its outer end and a tool-- post, T, moved vby said screw. The arm P is offset from its hub or collar, which encircles the shaft, to permit the hub or boss of the boring-tool R to pass beneath it.

S indicates a second radial feed stock orl arm, also provided with a feed screw, y, haviing a star-wheel, Q, at its outer end, and with a tool post or holder moved by the screw.

The boring head or tool R is divided in a plane parallel with the axis of the boring bar or shaft into two sections, which are drawn and held together by wed ges or keys z, passing through eyebolts U projecting from one section through ears formed on the other, as shown in Figs. 1 and 9.

The boring tool or head R is moved lengthwise upon the bar or shaft O by a screw, V, seated and journaled in a groove, W, therein, and projecting beyond the outer end of the bar or shaft, where it is furnished with a starwheel, X, and crank or handle Y. The starwheel X of screw V is given a partial rotation at each revolution of the boring bar or shaft by engagement with a stationary arm or stop, Z, placed in its path. The screw V and its star-Wheel X being eccentric to the boring bar or shaft, said star-wheel will encounter the stop Z during asmall portion of each revolution, the period being lengthened or shortened by setting the stop nearer to or further from the axis of the wheels. In like manner the set screws y y of the cross-feed stock l? and S are given a slight turn at each revolution of the boring bar or shaft by the engagement of their star-wheels Q. with fixed stops a on the hed or table E.

The stops a and Z require setting or adjustment for each different size of cylinder and to suit the work to be performed on each.

Motion isirnparted to the boringbanthrough gear-wheel N, from an elongated pinion, A', having a rib or spline, b, to enter the groove c' of the shaft B', upon which the pinion is mounted. The shaft B passes through an upright or standard, d', bolted to the bed or base A, and is held against end play by a collar at one end of said standard and by a pulley or cone, C', at the other side thereof, or in any other usual manner. The shaft also passes through an arm or bracket, e', bolted or otherwise made fast to the head or stock B and extending outward beyond the pinion, and finally passes through a hole or opening in the stock or head, so that as the stock or head is moved along the base the pinion is carried with it, but the shaft is not moved.

The purpose of elongating the pinion A is to permit the gear-wheel N to move back and forth a limited distance without becoming disconnected from or out of mesh with the pinion; and this movement is for the purpose of permitting the boring-bar (which is locked to the hollow arbor or spindle M while the machine is operating) to be moved lengthwise while rotating to dress off the periphery of the cylinder ends. To effect this longitudinal movement of the boring bar or shaft I employ a screw, D', the end of which is swiveled in the outer end of section O of the boring bar or shaft, and the body of which passes through a threaded hole in a cross-head, E, held by posts or rods F at a distance from the end of shaft O.

The screw is furnished withv a hand-wheel, G', by which to turn it, and with a jam-nut, H', also in the form of a hand-wheel,by which to lock the screw against being turned by the rotation of the boring bar or shaft.

The manner of adjusting and operating the machine is as follows: The bolts 7c are loosened, and the shaft D is turned to move the heads B C to the proper distance apart. The setscrews w are loosened, the pin :c is driven out, and the boring bar or shaft O is withdrawn through the hollow spindle M until its end isy dush with the face of cross-feed arm S, or nearly so. The cylinder to be bored is then placed upon the slides K and loosely secured thereto by the vfastening-bolts, the table or bed E is raised horizontally in line with the axis of the boring bar or shaft O, and the slides K are moved to bring said axis vertically in line. "When thus brought into position the cylinder is firmly clamped upon rthe IOO slides,an'd is then ready for boring, dressing, and finishing. The boring-shaft is then run forward to the section O', and the key ar4 is inserted to lock the two sections together. The boring tool or cutter is secured upon the boring bar or shaft, the cross-head S is moved up to the end of the cylinder, and the setscrews w and e' are tightened. The machine is then set in motion, and at each revolution ofthe boring-barthe cutting-tools areadvanced ai given distance until the work of boring and of facing the ends is completed.

To dress lthe periphery of the cylinder ends,

i. the tools of arms P and S are set at the required distance from the axis of the boring bar or shaft,l and as the shaft rotates it is moved lengthwise by screw D',

controlled by handwheel G', until the operation is completed.

The cross-feeds P and S may either or both be formed with two or more arms, each carryinga different kind of tool or tools differently adjusted, so that the operations of roughing and dressing, or roughing, dressing, and finishing, may be simultaneously performed.

With the machine constructed and operating as thus set forth,work may be performed rapidly and with great accuracy. One head only may be made movable, if desired, but it is preferred' to make both adjustable.

It is not essential that the sliding or inde pendent section O' of the boring bar or shaft be provided, as the same result may obviously be secured by making the tool-carrying arms P and S adjustable by means of a screw or other feed device in line with the axis of the boringbar, as indicated in Fig. 7.

Having thus described my invention, what I claim is 1. In a cylinder boring or dressing machine, the combination of base A, heads B C, vertically-adjustable table E, longitudinally-movable bar O, and cutter R, carried by said bar.

2. In a machine for boring cylinders,`the combination of a vertically-adjustable table, E, slides K K, adjustable transversely upon said table, -heads B C, one or both adjustable relatively to the table, a boring arbor or shaft, O, mounted in and longitudinally adjustable through the head or stock, and a boring head or tool secured to said shaft or bar.

3. The combination, substantially as described and shown, of base A, heads B C, provided with slots h, screw-shaft D, having right and left threaded portions d E, provided with slots j, bolts 7c, passing through slots h and j, hollow arbor M, carried by head or stock B, and provided with gearwheel N, boring-bar O O', cutter R, shaft B', and pinion A'.

4. In combination with base A, heads or stocks B C, and boring bar or shaft O O', screwshaft D, adapted and arranged to advance and recede the heads, substantiall y as set forth. 5. In combination with base A and heads B C, boring arbor or shaft O O', and verticallyadj ustable table E.

e, bed or tablev 8. In combination with base' A, heads BVC,

and boring-bar O, table' E,

provided with pinions m, described and shown.

9. In combination `with heads B C and a lboringshaft carried thereby, a verticallymovable table, and screwsF G at each end of said table, adapted to be turned simultaneously or independently to raise the table bodily or at one end only.

all substantially as vertical screws F y G, provided with pinions l, and shafts H I J,

l0. In combination with heads B C, and,`

with a boring-bar 'carried thereby, table or bed E, right and left screws F and G, provided with pinions Z, Vcross shafts H I, provided with pinions @connecting the screws F G, pivoted at one end and carried in an adjustable block, o, at the other end, and an eccentric, p, for raising and lowering said block.

11. In combination with base A and heads or stocks B C, the stock B, adjustable kupon the base, hollow arbor or spindle M, carried by head B and provided with gear M, boringbar O, passing through said arbor or spindle, standard d', mounted upon base A, grooved shaft B', journaled in said standard and eX- tending into head B, pinion A', provided with a rib to enter the grooved shaft B', upon which 4 it is mounted, and arm e', attached to head B and serving to move pinion A' as the head is moved.

12. In a cylinder-boring machine, the combination of a base, heads mounted upon said base, and a boring-bar made in two sections, one section mounted in each head and one adapted to slide through the head in which it is mounted, whereby the boring-bar may be withdrawn to permit the placing of a cylinder' between the heads.

13. In combination with base A and heads B O, a boring-bar composed of sections O O', one provided with a tenon and the other with a socket to receive the tenon, and a pin or key passing through the interlocking ends and serving to unite them, as set forth.

14. In combination with heads B C, boringbar O and cross-feed arm S, secured to the boring-bar, as and for the purpose set forth.

15. In combination with heads B C, boringbar O O', provided with boring-head B, and with cross-feed arm P offsetv to permit, the hub of the cutter to pass under it.

16. In combination with heads B C, hollow arbor or spindle M, mounted in head B, boringbar O, provided with groove or key-seat u, key o, seated in said groove and in the hollow arbor, and set-screw w, bearing upon said key, substantially as shown.

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iis

17. In combination with heads B C, boringbar O, provided with groove W, screw V, seated in said groove, and boring tool or head R, mounted upon the boring-bar and engaged with the screw, substantially as described and shown.

18. In combination with heads B C and ,boring-bar O, divided cutter or bornghead R.

19. In combination with heads B C, boringbar O, feedscrew V, seated in said bar and provided with star-wheel X, boring-head or cutter R, mounted upon the bar O and engaged with the screw, and stop Z, located in the path of star-wheel X and adapted to partially rotate the same at each revolution of the boring bar.

20. In combination with heads B C and table or bed E, boring-bar O, a radial arm mounted in said barand provided with a movable tool post or holder, a feed-screw, y, for movingsaid tool-holder, a star-wheel Xed upon said screw, and a stop, a', placed in the path of the star-wheel and serving to turn the wheel and screw as the radial arm moves past it.

21. In combination with base A, heads B C,

and elongated pinion A carried by head B, hollow arbor M, journaled in head B and provided with gear-wheel N, boring-bar O, passing through arbor M, extension O, mounted and arranged to rotate and slide in head C', screw D', swiveled in the end of extension O',

and a radial tool-carrying arm secured upon WALTER J. MUNoAsTER.

Witnesses:

O. SMITH, Jr., F. M. OFFUTT. 

